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1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Definitions for the Interfaces handler.
7 *
8 * Version: @(#)dev.h 1.0.10 08/12/93
9 *
10 * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@super.org>
14 * Alan Cox, <A.Cox@swansea.ac.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version
20 * 2 of the License, or (at your option) any later version.
21 *
22 * Moved to /usr/include/linux for NET3
23 */
24 #ifndef _LINUX_NETDEVICE_H
25 #define _LINUX_NETDEVICE_H
26
27 #include <linux/if.h>
28 #include <linux/if_ether.h>
29 #include <linux/skbuff.h>
30
31 /* for future expansion when we will have different priorities. */
32 #define DEV_NUMBUFFS 3
33 #define MAX_ADDR_LEN 7
34 #define MAX_HEADER 18
35
36 #define IS_MYADDR 1 /* address is (one of) our own */
37 #define IS_LOOPBACK 2 /* address is for LOOPBACK */
38 #define IS_BROADCAST 3 /* address is a valid broadcast */
39 #define IS_INVBCAST 4 /* Wrong netmask bcast not for us (unused)*/
40 #define IS_MULTICAST 5 /* Multicast IP address */
41
42 /*
43 * The DEVICE structure.
44 * Actually, this whole structure is a big mistake. It mixes I/O
45 * data with strictly "high-level" data, and it has to know about
46 * almost every data structure used in the INET module.
47 */
48 struct device
49 {
50
51 /*
52 * This is the first field of the "visible" part of this structure
53 * (i.e. as seen by users in the "Space.c" file). It is the name
54 * the interface.
55 */
56 char *name;
57
58 /* I/O specific fields - FIXME: Merge these and struct ifmap into one */
59 unsigned long rmem_end; /* shmem "recv" end */
60 unsigned long rmem_start; /* shmem "recv" start */
61 unsigned long mem_end; /* sahared mem end */
62 unsigned long mem_start; /* shared mem start */
63 unsigned short base_addr; /* device I/O address */
64 unsigned char irq; /* device IRQ number */
65
66 /* Low-level status flags. */
67 volatile unsigned char start, /* start an operation */
68 tbusy, /* transmitter busy */
69 interrupt; /* interrupt arrived */
70
71 struct device *next;
72
73 /* The device initialization function. Called only once. */
74 int (*init)(struct device *dev);
75
76 /* Some hardware also needs these fields, but they are not part of the
77 usual set specified in Space.c. */
78 unsigned char if_port; /* Selectable AUI, TP,..*/
79 unsigned char dma; /* DMA channel */
80
81 struct enet_statistics* (*get_stats)(struct device *dev);
82
83 /*
84 * This marks the end of the "visible" part of the structure. All
85 * fields hereafter are internal to the system, and may change at
86 * will (read: may be cleaned up at will).
87 */
88
89 /* These may be needed for future network-power-down code. */
90 unsigned long trans_start; /* Time (in jiffies) of last Tx */
91 unsigned long last_rx; /* Time of last Rx */
92
93 unsigned short flags; /* interface flags (a la BSD) */
94 unsigned short family; /* address family ID (AF_INET) */
95 unsigned short metric; /* routing metric (not used) */
96 unsigned short mtu; /* interface MTU value */
97 unsigned short type; /* interface hardware type */
98 unsigned short hard_header_len; /* hardware hdr length */
99 void *priv; /* pointer to private data */
100
101 /* Interface address info. */
102 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
103 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */
104 unsigned char addr_len; /* hardware address length */
105 unsigned long pa_addr; /* protocol address */
106 unsigned long pa_brdaddr; /* protocol broadcast addr */
107 unsigned long pa_dstaddr; /* protocol P-P other side addr */
108 unsigned long pa_mask; /* protocol netmask */
109 unsigned short pa_alen; /* protocol address length */
110
111 /* For load balancing driver pair support */
112
113 unsigned long pkt_queue; /* Packets queued */
114 struct device *slave; /* Slave device */
115
116
117 /* Pointer to the interface buffers. */
118 struct sk_buff_head buffs[DEV_NUMBUFFS];
119
120 /* Pointers to interface service routines. */
121 int (*open)(struct device *dev);
122 int (*stop)(struct device *dev);
123 int (*hard_start_xmit) (struct sk_buff *skb,
124 struct device *dev);
125 int (*hard_header) (unsigned char *buff,
126 struct device *dev,
127 unsigned short type,
128 void *daddr,
129 void *saddr,
130 unsigned len,
131 struct sk_buff *skb);
132 int (*rebuild_header)(void *eth, struct device *dev,
133 unsigned long raddr, struct sk_buff *skb);
134 unsigned short (*type_trans) (struct sk_buff *skb,
135 struct device *dev);
136 #define HAVE_MULTICAST
137 void (*set_multicast_list)(struct device *dev,
138 int num_addrs, void *addrs);
139 #define HAVE_SET_MAC_ADDR
140 int (*set_mac_address)(struct device *dev, void *addr);
141 #define HAVE_PRIVATE_IOCTL
142 int (*do_ioctl)(struct device *dev, struct ifreq *ifr);
143 #define HAVE_SET_CONFIG
144 int (*set_config)(struct device *dev, struct ifmap *map);
145
146 };
147
148
149 struct packet_type {
150 unsigned short type; /* This is really htons(ether_type). */
151 unsigned short copy:1;
152 int (*func) (struct sk_buff *, struct device *,
153 struct packet_type *);
154 void *data;
155 struct packet_type *next;
156 };
157
158
159 #ifdef __KERNEL__
160
161 /* Used by dev_rint */
162 #define IN_SKBUFF 1
163
164 extern volatile char in_bh;
165
166 extern struct device *dev_base;
167 extern struct packet_type *ptype_base;
168
169
170 extern int ip_addr_match(unsigned long addr1, unsigned long addr2);
171 extern int ip_chk_addr(unsigned long addr);
172 extern struct device *ip_dev_check(unsigned long daddr);
173 extern unsigned long ip_my_addr(void);
174 extern unsigned long ip_get_mask(unsigned long addr);
175
176 extern void dev_add_pack(struct packet_type *pt);
177 extern void dev_remove_pack(struct packet_type *pt);
178 extern struct device *dev_get(char *name);
179 extern int dev_open(struct device *dev);
180 extern int dev_close(struct device *dev);
181 extern void dev_queue_xmit(struct sk_buff *skb, struct device *dev,
182 int pri);
183 #define HAVE_NETIF_RX 1
184 extern void netif_rx(struct sk_buff *skb);
185 /* The old interface to netif_rx(). */
186 extern int dev_rint(unsigned char *buff, long len, int flags,
187 struct device * dev);
188 extern void dev_transmit(void);
189 extern int in_net_bh(void);
190 extern void net_bh(void *tmp);
191 extern void dev_tint(struct device *dev);
192 extern int dev_get_info(char *buffer, char **start, off_t offset, int length);
193 extern int dev_ioctl(unsigned int cmd, void *);
194
195 extern void dev_init(void);
196
197 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
198
199 extern void ether_setup(struct device *dev);
200 extern int ether_config(struct device *dev, struct ifmap *map);
201 /* Support for loadable net-drivers */
202 extern int register_netdev(struct device *dev);
203 extern void unregister_netdev(struct device *dev);
204
205 #endif /* __KERNEL__ */
206
207 #endif /* _LINUX_DEV_H */
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*/